
Fuel injectors are fuel metering devices that spray atomized droplets of fuel into the engine's intake manifold or directly into the combustion chamber. They are usually connected to a fuel rail located on top of the engine. Over time, fuel injectors can become clogged with deposits, causing an imbalance in their performance. This can lead to issues such as rough idle, loss of power, or misfiring. While some people opt for fuel injector cleaning services, which can be costly, others choose to use fuel injector cleaners or fuel system cleaners. Some popular options include Seafoam, Lucas fuel injection cleaner, and Techron Fuel System Cleaner. However, it is important to note that Infiniti does not recommend the use of aftermarket fuel additives, and that cleaning injectors while they are still in the car may not be as effective as off-the-car cleaning.
| Characteristics | Values |
|---|---|
| Fuel injector cleaner effectiveness | Opinions vary on the effectiveness of fuel injector cleaners. Some recommend using injector cleaners such as Seafoam, Lucas, Techron, or RedLine, while others suggest that they are not effective for high mileage vehicles and that professional cleaning or replacement is a better option. |
| Fuel injector cleaning service cost | The cost of a fuel injector cleaning service at a dealership can be expensive, ranging from $199 to over $300. |
| Fuel injector replacement | Fuel injectors can be replaced or serviced once removed from the car. Replacement may be a better option than cleaning, as it can be difficult to access the injectors, and cleaning does not always solve the problem. |
| Fuel injector cleaning process | The fuel injector cleaning process involves disconnecting the fuel line, connecting a cleaning canister with a regulator, and setting the canister pressure below the normal operating pressure to avoid wasting cleaning fluid. |
| Fuel injector function | Fuel injectors spray atomized droplets of fuel into the engine's intake manifold or combustion chamber, and their operation is controlled by the powertrain control module (PCM). |
| Fuel injector issues | Faults in the fuel injection system can cause rough idle, loss of power, or misfiring. Injectors can become clogged over time, leading to engine performance issues. |
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What You'll Learn

OTC Fuel Injection Cleaning kits
The OTC Fuel Injection Cleaning Kit is a popular choice for cleaning fuel injectors in Infiniti G37s. The kit includes a canister and an air pressure regulator, as well as various fuel fittings for different models. It is designed to work on a wide range of engines, both domestic and imported.
The process of using the OTC kit involves finding the fuel feed connection, typically located on the rear passenger side of the motor, and disconnecting the fuel line quick connector. The cleaning canister with the regulator is then connected to the quick connector. As a safety measure, it is recommended to pull the fuel pump fuse.
One advantage of the OTC kit is its ability to perform low- and high-pressure fuel system tests. Additionally, it can be used with a shop's pressurized air supply for enhanced cleaning without the need for expensive propellants. The kit also includes a wide throat for spill-proof fluid transfer and a mechanical pressure gauge for easy monitoring.
While the OTC kit generally receives positive reviews, some users have noted that it may require additional adapters for certain vehicles. It is recommended to consult the OTC website and review the detailed specifications to ensure compatibility with your specific vehicle. The included manual may also provide valuable instructions for car-specific applications.
Overall, the OTC Fuel Injection Cleaning Kit offers a comprehensive solution for cleaning fuel injectors in Infiniti G37s, providing effective cleaning, testing capabilities, and compatibility with various engine types.
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SeaFoam
To use SeaFoam, you can try the 1/3 gas tank, 1/3 crankcase, 1/3 brake booster, or intake tube method. You can also add a bottle of SeaFoam to your fuel tank, but this may cause your mpg to suffer during the run.
Some people have found that SeaFoam is not as effective as other fuel injector cleaners, such as Lucas fuel injection cleaner, which costs $5.99. Others have found that it is a waste of money, as fuel injectors have become very reliable, and all fuels contain detergents that keep the injectors clean.
It is important to note that the Infiniti manufacturer does not recommend any fuel additives to be used, and some people suggest that it is better to have a dealership perform a fuel injector cleaning service if you think there is a problem with your fuel injectors.
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Lucas Fuel Injection Cleaner
The Lucas Fuel Injection Cleaner is a popular product that has been praised by many users for its effectiveness in cleaning fuel injectors and improving engine performance. It is formulated for both gasoline and diesel engines and can be used in carbureted or fuel-injected vehicles.
The product contains a blend of oils and additives with high detergent action, which helps to clean and lubricate the injectors, carburetor, fuel lines, and upper cylinder of the engine. This, in turn, improves the fuel burning process, resulting in increased power and reduced fuel consumption. The manufacturer recommends using 2-3 ounces of the cleaner for every 10 gallons of fuel. The product can be purchased in different-sized bottles, with the 5.25-ounce bottle treating up to 25 gallons of fuel and the one-quart/32-ounce bottle treating up to 100 gallons.
Users have reported noticeable improvements in their vehicles after using the Lucas Fuel Injection Cleaner. Some have observed that their cars start faster and smoother, with increased power and acceleration. The product has also been known to turn off the check engine light and improve fuel efficiency.
One user with a 2008 Ford vehicle and over 100,000 miles on it reported feeling a significant difference after using the Lucas Fuel Injection Cleaner. Another user with a 2006 Silverado 6.0 lq9, however, experienced their engine light coming on after using the product, suspecting that it might have affected the O2 sensors. It is important to note that while the product is generally well-received, individual experiences may vary.
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Cleaning vs. replacing injectors
There are several factors to consider when deciding whether to clean or replace fuel injectors. Firstly, the age and condition of the injectors play a crucial role. If the injectors are old or severely worn out, cleaning them may not effectively restore their performance and could potentially cause further damage. In such cases, replacement might be the better option. However, if the injectors are relatively new and the clogging is mild to moderate, cleaning them may be sufficient to improve their function.
The severity of clogging is another factor to consider. While mild to moderate clogging can often be addressed through cleaning, severe clogging may necessitate injector replacement. Additionally, the type of fuel system can influence the decision. Certain fuel systems are more prone to dirt and clogging, requiring more frequent cleaning or replacement.
Cost is also a significant factor in the decision-making process. Generally, cleaning fuel injectors is less expensive than replacing them. However, it is important to note that cleaning may not always solve the problem if the injectors are severely damaged. In such cases, opting for replacement upfront might be more cost-effective in the long run.
It is worth mentioning that cleaning fuel injectors should typically be performed by a trained or experienced mechanic. Improper cleaning techniques can sometimes lead to further issues. On the other hand, replacement injectors can be installed by skilled individuals with automotive knowledge, potentially saving on labour costs.
Lastly, the specific issues with the injectors and customer preference will influence the decision to repair or replace. If the injectors are malfunctioning due to minor issues, cleaning might be a viable option. However, if the injectors are severely damaged or beyond repair, replacement becomes necessary.
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Ultrasonic cleaning
To clean fuel injectors using an ultrasonic cleaner, follow these steps:
- Remove the injectors from the fuel rail: Before beginning the cleaning process, safely remove the injectors from your Infiniti G37's fuel rail. This may require some disassembly of the engine and should be done when the engine is cold to prevent any safety hazards.
- Set up the ultrasonic cleaner: Prepare the ultrasonic cleaning machine by filling it with an appropriate cleaning solution. Some common chemicals used in ultrasonic cleaning include alcohol, ammonia, and soap-based solutions. It is important to use a cleaning solution that is compatible with the injector's materials and will effectively remove the built-up contaminants.
- Connect the injectors: With the machine set up, connect the electricals to the injectors. This typically involves attaching the injectors to a power source that will allow them to be activated during the cleaning process.
- Immerse the injectors: Place the injectors in the ultrasonic cleaning machine, ensuring that they are fully submerged in the cleaning solution. The injector nozzles should be positioned close to the transducers in the machine, as this is where the ultrasonic waves are generated.
- Apply ultrasonic waves: Turn on the ultrasonic cleaner and allow the high-frequency sound waves to propagate through the cleaning solution. The ultrasonic waves create tiny cavitation bubbles that collapse onto the surface of the injectors, dislodging contaminants and cleaning the surfaces.
- Flow check and calibration: After cleaning, remove the injectors from the solution and perform a flow check using calibration fluid. This step ensures that the injectors are functioning correctly and that the spray patterns are optimal. It may be necessary to adjust the voltage or other settings during this step to achieve the desired results.
- Reinstall the injectors: Once the injectors are clean and functioning properly, carefully reinstall them into the fuel rail of your Infiniti G37. Ensure that all connections are secure and that there are no leaks. Refer to your vehicle's repair manual or seek professional assistance if needed.
It is important to note that ultrasonic cleaning may not always produce satisfactory results, especially if the injectors are heavily contaminated or if the correct cleaning procedures are not followed. In some cases, it may be necessary to seek professional injector cleaning services or consider replacing the injectors outright. Additionally, always exercise caution when working with chemicals and ensure proper ventilation during the cleaning process.
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Frequently asked questions
There are several ways to clean your Infiniti G37's fuel injectors. You can use a fuel injector cleaner, such as Seafoam, Lucas fuel injection cleaner, or Techron. Alternatively, you can use an OTC Fuel Injection Cleaning kit, which includes a canister and an air pressure regulator. If you are uncomfortable performing the cleaning yourself, you can take your car to a dealership for a fuel injector cleaning service, or send your injectors to a professional cleaning service.
It is recommended to clean your fuel injectors every 75,000 miles.
If your car is experiencing a rough idle, loss of power, or misfiring, it may be due to a problem with your fuel injectors. Another sign is if your car is jerky or stumbly when accelerating or decelerating.
The cost of cleaning your Infiniti G37's fuel injectors can vary depending on the method you choose. Fuel injector cleaners typically range from $5.99 to $20. An OTC Fuel Injection Cleaning kit may cost around $20. A fuel injector cleaning service at a dealership can cost over $300, while a professional injector service facility may charge a relatively low cost to clean and replace the filters.
It is generally recommended to replace the fuel injectors if they are severely clogged or malfunctioning. Cleaning may not always solve the problem or clean the injectors to the degree they need to be. However, regular use of a reputable fuel injector cleaner can help maintain the injectors and prevent the need for frequent cleaning or replacement.










































